/*********************************************************************
*                SEGGER Microcontroller GmbH & Co. KG                *
*        Solutions for real time microcontroller applications        *
**********************************************************************
*                                                                    *
*        (c) 1996 - 2014  SEGGER Microcontroller GmbH & Co. KG       *
*                                                                    *
*        Internet: www.segger.com    Support:  support@segger.com    *
*                                                                    *
**********************************************************************

** emWin V5.26 - Graphical user interface for embedded applications **
emWin is protected by international copyright laws.   Knowledge of the
source code may not be used to write a similar product.  This file may
only be used in accordance with a license and should not be re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File        : 2DGL_DrawJPEGScaled.c
Purpose     : Example for drawing scaled JPG files without loading
              them into memory
Requirements: WindowManager - ( )
              MemoryDevices - ( )
              AntiAliasing  - ( )
              VNC-Server    - ( )
              PNG-Library   - ( )
              TrueTypeFonts - ( )

              Can be used in a MS Windows environment only!
----------------------------------------------------------------------
*/

#ifndef SKIP_TEST

#include <windows.h>
#include <stdio.h>
#include "GUI.h"
#include "EDIT.h"

/*********************************************************************
*
*       Static data
*
**********************************************************************
*/
static char _acBuffer[0x200];

/*********************************************************************
*
*       Static code
*
**********************************************************************
*/
/*********************************************************************
*
*       _GetData
*
* Function description
*   This routine is called by GUI_JPEG_DrawEx(). The routine is responsible
*   for setting the data pointer to a valid data location with at least
*   one valid byte.
*
* Parameters:
*   p           - Pointer to application defined data.
*   NumBytesReq - Number of bytes requested.
*   ppData      - Pointer to data pointer. This pointer should be set to
*                 a valid location.
*   StartOfFile - If this flag is 1, the data pointer should be set to the
*                 beginning of the data stream.
*
* Return value:
*   Number of data bytes available.
*/
static int _GetData(void * p, const U8 ** ppData, unsigned NumBytesReq, U32 Off) {
  HANDLE * phFile;
  DWORD    NumBytesRead;

  phFile = (HANDLE *)p;
  /*
  * Check buffer size
  */
  if (NumBytesReq > sizeof(_acBuffer)) {
    NumBytesReq = sizeof(_acBuffer);
  }
  /*
  * Set file pointer to the required position
  */
  SetFilePointer(*phFile, Off, 0, FILE_BEGIN);
  /*
  * Read data into buffer
  */
  ReadFile(*phFile, _acBuffer, NumBytesReq, &NumBytesRead, NULL);
  /*
  * Set data pointer to the beginning of the buffer
  */
  *ppData = _acBuffer;
  /*
  * Return number of available bytes
  */
  return NumBytesRead;
}

/*********************************************************************
*
*       _DrawJPEG
*/
static void _DrawJPEG(const char * sFilename) {
  GUI_JPEG_INFO Info;
  HANDLE        hFile;
  int           XPos;
  int           YPos;
  int           XSize;
  int           YSize;
  int           nx;
  int           ny;
  int           n;

  hFile = CreateFile(sFilename, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
  GUI_JPEG_GetInfoEx(_GetData, &hFile, &Info);
  GUI_ClearRect(0, 60, 319, 239);
  nx = 320000 / Info.XSize;
  ny = 180000 / Info.YSize;
  if (nx < ny) {
    n = nx;
  } else {
    n = ny;
  }
  XSize = Info.XSize * n / 1000;
  YSize = Info.YSize * n / 1000;
  XPos = (320 - XSize) / 2;
  YPos = (180 - YSize) / 2 + 60;
  if (n > 1000) {
    int temp=0;
  }
  GUI_JPEG_DrawScaledEx(_GetData, &hFile, XPos, YPos, n, 1000);
  GUI_Delay(1000);
  CloseHandle(hFile);
}

/*******************************************************************
*
*       _GetFirstBitmapDirectory
*
* Function description
*   Returns the first directory which contains one or more JPG files
*/
static int _GetFirstBitmapDirectory(char * pDir, char * pBuffer) {
  WIN32_FIND_DATA Context;
  char            acMask[_MAX_PATH];
  char            acPath[_MAX_PATH];
  HANDLE          hFind;

  sprintf(acMask, "%s\\*.jpg", pDir);
  hFind = FindFirstFile(acMask, &Context);
  if (hFind != INVALID_HANDLE_VALUE) {
    sprintf(pBuffer, "%s\\", pDir);
    return 1;
  }
  sprintf(acMask, "%s\\*.", pDir);
  hFind = FindFirstFile(acMask, &Context);
  if (hFind != INVALID_HANDLE_VALUE) {
    do {
      if ((strcmp(Context.cFileName, ".") != 0) && (strcmp(Context.cFileName, "..") != 0)) {
        if (Context.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
          sprintf(acPath, "%s\\%s", pDir, Context.cFileName);
          if (_GetFirstBitmapDirectory(acPath, pBuffer)) {
            return 1;
          }
        }
      }
    } while (FindNextFile(hFind, &Context));
  }
  return 0;
}

/*******************************************************************
*
*       _DrawJPEGS
*
* Iterates over all JPEG files of a directory
*/
static void _DrawJPEGS(void) {
  WIN32_FIND_DATA Context;
  static char     acPath[_MAX_PATH];
  HANDLE          hFind;
  char            acMask[_MAX_PATH];
  char            acFile[_MAX_PATH];
  char            acBuffer[_MAX_PATH];

  GUI_SetBkColor(GUI_BLACK);
  GUI_Clear();
  GUI_SetColor(GUI_WHITE);
  GUI_SetFont(&GUI_Font24_ASCII);
  GUI_DispStringHCenterAt("Drawing scaled JPEGs - Sample", 160, 5);
  GetWindowsDirectory(acBuffer, sizeof(acBuffer));
  _GetFirstBitmapDirectory(acBuffer, acPath);
  GUI_SetFont(&GUI_Font8x16);
  sprintf(acMask, "%s*.jp*", acPath);
  hFind = FindFirstFile(acMask, &Context);
  if (hFind != INVALID_HANDLE_VALUE) {
    do {
      sprintf(acFile, "%s%s", acPath, Context.cFileName);
      GUI_DispStringAtCEOL(acFile, 5, 40);
      _DrawJPEG(acFile);
    } while (FindNextFile(hFind, &Context));
  } else {
    GUI_DispStringHCenterAt("No JPEG files found!", 160, 60);
    GUI_Delay(2000);
  }
}

/*********************************************************************
*
*       Public code
*
**********************************************************************
*/
/*********************************************************************
*
*       MainTask
*/
void MainTask(void) {
  GUI_Init();
  while(1) {
    _DrawJPEGS();
  }
}

#endif

/*************************** End of file ****************************/
